1 files changed, 35 insertions, 0 deletions
diff --git a/src/dirty.rs b/src/dirty.rs
new file mode 100644
index 0000000..fe6e4d1
--- /dev/null
+++ b/src/dirty.rs
@@ -0,0 +1,35 @@
+#[derive(PartialEq, Eq, Hash, Clone, Debug)]
+pub struct DirtyBit(bool);
+
+pub trait Dirtyable {
+    fn get_bit(&self) -> &DirtyBit;
+    fn get_bit_mut(&mut self) -> &mut DirtyBit;
+
+    fn is_dirty(&self) -> bool {
+        self.get_bit().0
+    }
+
+    fn set_dirty(&mut self) {
+        self.get_bit_mut().0 = true;
+    }
+    fn set_clean(&mut self) {
+        self.get_bit_mut().0 = false;
+    }
+}
+
+
+impl DirtyBit {
+    pub fn new() -> DirtyBit {
+        DirtyBit(false)
+    }
+}
+
+
+impl Dirtyable for DirtyBit {
+    fn get_bit(&self) -> &DirtyBit {
+        self
+    }
+    fn get_bit_mut(&mut self) -> &mut DirtyBit {
+        self
+    }
+}